sintz



No. 6|2,6|8. Patented Oct. I8, |898.

G. SINTZ.

PRUPELLER.

(Application tiled Jan. 27,' 1897.)

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No. 612,6is. l Patented uct. la, |398.

G. smTz.

PBOPELLER.

(Application filed Jan. 27, 1897.) v(No Model.)

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a 3. Mw u I? wf I, m 0 n `on. Il .n Z n u. m Q d 3 N z m f Z/ .w a DI m w .n.m. ZE o TLm W mum SPm m on 6mm M ,ff i l M 2, i K W MW .Il `.u 4. s. M X u 0 GEORGE SINTZ, OF SEATTLE, WASHINGTON.

` PROPELLER.

SPECIFICATION forming part of Letters Patent No. 612,618, dated October 18, 1898. Application led January 27, 189'7. Serial No. 620.906. (No model.)

To all whom it may concern:

Be it known that I, GEORGE SINTZ, a citizen of the United States, residing at Seattle, in the county of King and State of Vtashington, have invented a new and useful Propeller, of which the following is a specification.

My invention relates to improvements in propellers which are adapted to propel boats and in which the blades or flukes thereof may be rotated to form screw-propellers of various pitch; and the objects of my improvement are, first, to provide a durable propeller of simple construction in which the pitch of the blades or flukes may be changed to provide for a forward or backward movement or tocease propulsion of the boat without stopping or changing the direction of rotation of the propeller-shaft, and when the boat is afforded other means of propulsion the blades may be set to produce the least amount of friction in passing through the water; second, in providing foi` the attachment of the blades or flukes to avoid protuberances on the hub,`

relative position of the' different parts thereof when the blades are set to provide a forward or backward motion of the boat, according to the direction of rotation of the propeller-shaft; Fig. 2, a similar view of my propeller, but with the stern-bearing shown and the propeller-blades shifted to a position desirable when the boat is adapted for propulsion by other means than the propeller shown; Fig. 3, a similarview to Fig. 1, but showing the position of the parts and blades when desirable to rotate the propeller-shaft without propelling the boat; Fig. t, a detailed view of a yoke adapted to engage a groove in the propeller-hub and employed when shifting the` hub longitudinally upon the shaft in changing the positions of the propeller-blades and in retaining same in any desired position; Fig. 5, a side view of my propeller, showing the hub thereof connected with a stern-bearing, as necessary when the different positions of the'blades are to be obtained by a longitudinal movement of `the propeller-shaft; Fig. 6, a perspective view, on large scale, showing the toothed connection between the propeller shaft and blades; Fig. 7, a perspective View of the shifting-ring, fulcrum, and rod comprising a portion of the mechanism employed in one method of shifting the propeller-hub longitudinally upon the shaft in changing the pitch of the propeller-blades; Fig. 8, a cross-section on line y .e of Fig. 9, indicating the arrangements of parts in the construction vof my propeller with three blades; Fig. 9, a longitudinal section of the propeller-hub, disclosing the rack-block and propeller-shaft; Figs. 10 and 11, end and side views, respectively, on large scale, of the rackblock when formed and provided with racks for a propeller comprising three blades; Fig.

12, a cross-section similar to Fig. 8, but indi# eating the arrangement and form of parts inf the construction of my propeller when com` prising four blades; Figs. 13 and 14, endand side views, respectively, on large scale, of the blade-shank when constructed for engagement with a rack of the rack-block disclosed by Figs. 10 and 11; Fig. 15, aplan view of the split retaining-plate adapted to engage an annular groove provided in the propeller-hub and to be fastened to the stern-bearing and retain the hub when desirable to change the position of the propeller-blades by shifting the propeller-shaft longitudinally; Fig. 16, a cross-section similar to Fig. 8,u but indicating the arrangement and form of parts in the construction of my propeller with two blades adapted for rotation upon their axes bymeans of a rack-block and toothed ange; Fig. 17, a side view of the propeller, propeller-shaft, and Sternbearingand one form of shifting mechanism adapted to move the propeller.-

shaft longitudinally when desirable to change the position of the propeller-blades thereby and the end of the motive shaft and coupling therewith shown; Fig. 1S, a side view of my propeller with two blades and the stern-bearing shown in section, with one forni of shift- IOO ing mechanism in place to retain the blades in position to rotate the propeller without propulsion of the boat; Fig. 19, a similar View, but indicating the position of the hub, blades,

and shifting mechanism when desirable to propel the boat forward upon the rotation of the propeller-shaft over from port to star-- board; Fig. 20, a longitudinal section through the center of the hub-shell, clamping-collars,r and shifting-collar, disclosing the rack-block within the hub and indicating the parts shifted to provide a backward movement of the 'boat when the shaft is rotating as described for Fig. 19; and Fig. 21, a perspective view of the divided propeller-hub, indicating the lines of parting, and one clamping-collar in section, retaining the shifting-collar, and the opposite clamping-collar detached.

Like characters of reference indicate corresponding partsthroughout the several views of the drawings.

The hollow hub A is longitudinally divided into two or more sections, which are held in position about the propeller-shaft by clamping-collars l) and b and are adapted top'rovide journalsfor the propeller-blades C', the shanks of which are provided with iianges a and A4,witl1 a journal a2 therebetweenadapted: to receive the ring-boss B, which is diametrica-lly partedby dividing the hub Aiuto-said: longitudinal sections. This separation of the hub A into the sections above mentioned' provides for the setting of the propellerblades C upon bosses B and the introduction of they rack-block A2 of the propeller-shaf-tD. within the hub.

In. the construction of propellersv comprising but two blades the connection between; thel propeller-shaft D and blades C may beaceomplished by av rack-block A2, fastened" about or. cong ointly formed with the propellershaft and having engagement with al ii'ange- A4 of the blade C by the teeth provided.

therein adapted tomeshwith arack A3,.pro vided on said' block A2 at opposite sides thereof,and in the construction-of propellerscomprising three blades the rack-block A2 is formed tov contain the requisitel number of racks A3 to provide for-theengagement thereof with the teeth in the flange A4 of eachl propeller-blade C, and the hub A is formed of the same number of longitudinal sectionsto provide for the setting of each blade C', thejournal a2 of whichis therebyiinclosed by the ring-boss B, and the flanges a and Af1 thereof lit snugly upon each face of the boss, forming a. strong and durable support for each blade C', as clearly indicated in the several viewsl of the drawings. blades C in position and inclosing the rackblock A2 within the shell of the divided hub A the longitudinal sections comprisingthe hub are secured together by the clampingcollars b and b', fitting about the hub at each end by means of a threaded connection therewith, or the collars b and b may be set aboutv thev hub by driving same over theends, thus After setting the vclamping the sections together upon their `parting surfaces loosely about the shaft D, permitting of a longitudinal shifting of the hub or shaft when desirable.

To provide for the rotation of the propellerblades C upon their axes, when desirable to change the pitch thereof, alongitudinal movement of the hub A upon the shaft D or a .similar movement of the shaft within the hub Eis necessary, that the toothed connections bctween the propeller blades and shaft hereto- ,fore explained may perform their functions. WVhen desirable to obtain this rotation of the propeller-blades C by a longitudinal shifting -of the hub A upon the shaft D, the yoke e3 (indicated in Figs. 1, 2, 3, and 4) may be emfployed. Thisyoke is adapted to fit loosely fina groove provided between thel clamping- 'collar b' and a shoulder formed by the shell:

of the hub A and is adapted to slip the hub Qupon the shaft, whilepermitting of the rotation of same. This movement is obtained by operati-ng the shifting-rod @,which-isprovided- Iwith any ordinary means for obtaining aloniwith aa shifting-rod e', which is adapted tov ith-row the shifting-ring, thereby shifting thehub-longitudinally uponfthe'shaft, andis pro- 1' videdwith any ordinary meansv for retaining i the hub in anydesired position, thus. securging1 thepitch-of thepropeller-blades C', as regquired. When desirable-toprovidefor the diiferent positions of the'propeller-blades C :by shifting the propeller-shaft D longitudinally within the hubfA, the hub is secured ifromlongitudinal movement by a split re- Itaining-platel E2, (shown in Figs. 5, 15, and

17,) adaptedto-ft looselyin the groove formed between the clamping-collar b and the shoulder formed by the shell of the h'ub'A a-ndfas- @tened tothe plate E of the stern-bearing. FThe shaft D may then be shiftedv as desired by the mechanismillustratedr in Fig. 17 in which. the propeller-shaft D has connection with a motive shaft` D/ by a coupling, fast to the end of shaft D' and having a longitudinal*slotg,engaging a pin g,, fast in the shaft D, nearthe end thereof, and'permitti-ng of the longitudinal movement of thev propel:- ler-shaft Dwithout disturbing the position of the l'motive shaft D ment is obtain ed by actuating. a lever g2, which isfuleru'med to aY bracket gG by a pivot g5 and has pivotal connection with a loose `collar G', retained between the-set collars G, ga' ping3 ofsaid loose collar engaging an elon- This lever may gated slot g4 in saidlever.

This longitudinal move-- IIO be provided with any ordinary means for locking in different positions.

It Will be noted that when the propeller shaft and hub are secured in any desired position against end motion the toothed connection between the shaft and Shanks of the propellereblades locks the blades in a relative position thereto, retaining them at the desired pitch.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination of a propeller-shaft, a rack-block thereon, a hub loose upon said shaft inclosing said block, propeller-blades journaled in said hub, each having toothed connection with said block, concentric with said journal but Within said hub, and means for shifting said hub endwise to rotate said 'blades in passing said block; substantially as shown and described.

2. The combination of a propeller-shaft, a block thereon carrying racks, a hub loose upon said shaft inclosing said bloclgpropellerblades j ournaled in said hub, each having teeth concentric with said journal and engaging one of said racks Within said hub, and means for shifting said hub endwise to rotate said blades in passing said block; substantially as shown and described.

3. The combination of a propeller-shaft, a rack-block thereon, aloose hub inclosing said block and comprising longitudinal sections with half-ring bosses registering on the lines of parting, and means for clamping said sections together, propeller-blades journaled in said ring-bosses with anges at each face,

and teeth on the under of said flanges engaging said block, and means adapted to shift said hub endWise to rotate said blades in passing said block, substantially as shown and described.

4. The combination of a propeller-shaft, a block fast thereon carrying racks, aloose hub in closing said block and comprising longitudinal sections with half-ring bosses registering on the lines of parting, and means for clamping said sections together, propellerblades journaled in said ring-bosses with flanges at each face, and teeth in the under of said flanges .engaging one of said racks, and means adapted to shift said hub endWise to rotate said blades in passing said block, substantially as shown and described.

v5. In propellers comprising a hollow hub adapted to be moved endwise, and revoluble blades journaled through the case thereof, and a shaft through said hub, the combination of a rack-block fast on said shaft, with the means on said blades for engagement With said racks concentric With said journals; substantially as shown and described.

6. In propellers having revoluble'blades, the hollow hub thereof comprising longitudinal sections with half-ring bosses registering on the lines of parting adapted to journal said blades, and means for clamping said sections together about the propeller-shaft,and blade-journals; substantially as shown and described.

GEORGE SINTZ.

lVitnesses:

FRANK E. ADAMS,

)mannen L. WHITE. 

